Tuning-slide for trumpewts and the like



E. B. STHNDORFF.

TUNING SLIDE FOR TRUMPETS AND THE LIKE.

APPLICATION FILED uuz. 6, I920.

1 ,382,688 Patented J 11116 28, 1921.

WITNESSES INVENTOR /i a v x LIB Sifelbdorfif A TI URNEYS PATENT OFFICE.

EDWARD BEHJ'AIIH STKIITDOBFI', OF STILLWATH, KDTNESOTA.

WW3 FOB 'rnmn'rs AND THE LIKE.

srwificafion of letters Patent- Patented June 28, 1921.

Application fled December 6, 1920. Serial 8o. 428,503.

To all whom it may concern:

Be it known that I, EDWARD BENJAMCIN S'rnmnonrr, a citizen of the United States, and a resident of Stillwater, in the county of Washington and State of Minnesota, have invented certain new and useful Improvements in Tuning-Slides for Trumpets and the like, of which the following is a specificatlon.

My present invention relates generally to trumpets and similar musical instruments employing tuning slides, and is more ticularly an adjustable stop by which to determine the position of the slide to produce a note of desired pitch from the instrument of which the slide constitutes a part, the object of my invention being the provision of a simple effective construction em bodying threadedly engaged adjustable parts and stop members whose relative movement takes place without danger of impairment of the threads.

In the accompanying drawing in which I have shown my invention applied and also in detail,

Figure 1 is a side view of a trumpet provided with my improvements,

Fig. 2 is a central longitudinal section through telescoping portions of the tuning slide and the trumpet tube receiving the same, with my improved stop attached, and

Fig. 3 is a vertical transverse section taken on line 3-3 of Fig. 2.

Referring now. to these figures I have shown my invention applied to a trumpet generally indicated at 10 in Fig. 1 although it is to be understood that it may be applied with equal facility to various other instruments employing tuning slides of the character. of the tuning slide 11 whose extensions 12 slidably telescope within the ad- 'acent trumpet or guide tubes 13 and .14.

he tuning slide 11 is shown with a hand piece 15 bridging the same and with the usual water discharge valve 16,. and according to myimprovements is provided with an outstanding stud 17 in which is fixed one end of an adjusting rod 18. This rod projects parallel with and along the extension 12 of the tuning slide 11 which enters theguide tube 13 of the instrument, and is threaded as at 19' for the major portion of its length from its forward free end.

The guide tube 13 of the instrument is also provided with an outstanding guide par stud 20, alined with the stud 17 of the taning slide and provided with an enlarged opening through which an adjusting tube 21 is freely slidable. The rear end of this tube has an enlarged head 22 forming a finger piece and for this purpose it is knurled as seen in Fig. 1. The bore of the tube is threaded for the reception of the rod 19 and its rear end is externally threaded for the reception of a collar 23 so that with the parts assembled as shown it is obvious relative movement of tube 21 through the guide or hearing stud 20 is limited to the space between the head 22 and the collar 23. This movement defines and determines the relative movement of the tuning slide with respect to the instrument tubes 13 and 14, while it is quite obvious that rotation of the tubular stop member 21 is capable of bringing about a fine adjustment of the two positions of the tuning slide in respect to the instrument.

By thus utilizing a tubular stop member having .a smooth surface working through the smooth bore of a guide stud, and thread.- ing this tubular guide member on a rod attached to the tuning slide, it is quite obvious that effective movement of the slide between the pitches for which it is set can be accomplished without danger of wear of the ad'usting threads.

y improved construction also permits of ready assembly and disassembly. For disassembling the parts it issimply necessary to unscrew the collar 23, for which purpose the latter is preferably knurled, and then unscrew the tubular slide 21 from the rod 19, after which in view of the removal of collar 23 it may be pulled forwardly through the dguide or hearing stud 20 if this is desire Ordinarily to entirely remove the tuning slide 11 it is simply necessary to unscrew the tube 21 entirely from the rod 18 without removing collar 23.

I claim:

1. A wind instrument having a tuning slide and guide tubes in which the tuning slide works, a rod fixed to the tuning slide and paralleling a portion thereof in one of the guide tubes, a bearing stud projecting. from the said guide tube, a tubularstop member freely slidable through the said bearing stud and having a threaded bore receivingv the threaded adjusting rod, and members at opposite ends of the said tubular stop, coiiperating with the bearing stud to limit the movements of the tuning slide as described.

2. A wind instrument having a tuning 5 slide and guide tubes in which the tuning slide works,'a, rod fixed to the tuning slide and paralleling a portion thereof in one of the guide tubes, a bearing stud projecting 'from the said guide tube, a tubular stop 10 member freely slidable through the said bearing stud and having a. threaded bore receiving the threaded adjusting rod, and members at opposite ends of the said tubular stop, eoiiperating with the bearing stud to limit the movements of the tuning slide, one of said members being in the nature of a collar threaded on the tubular stop at its inner end to facilitate assembly and disassembly.

EDWARD BENJAIIK S'liINDORI-F. 

